66334431 has 8 divisors (see below), whose sum is σ = 88895664. Its totient is φ = 43998080.

The previous prime is 66334421. The next prime is 66334439. The reversal of 66334431 is 13443366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66334431 - 2⁵ = 66334399 is a prime.

It is a super-2 number, since 2×66334431² = 8800513472187522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66334439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55530 + ... + 56711.

It is an arithmetic number, because the mean of its divisors is an integer number (11111958).

Almost surely, 2^66334431 is an apocalyptic number.

66334431 is a deficient number, since it is larger than the sum of its proper divisors (22561233).

66334431 is a wasteful number, since it uses less digits than its factorization.

66334431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112441.

The product of its digits is 15552, while the sum is 30.

The square root of 66334431 is about 8144.5952017273. The cubic root of 66334431 is about 404.8054361905.

Adding to 66334431 its reverse (13443366), we get a palindrome (79777797).

The spelling of 66334431 in words is "sixty-six million, three hundred thirty-four thousand, four hundred thirty-one".